BQM 178

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  Difficulty: Advanced   Keywords: Life & Death, Question

Velobici: The following is a problem from Weiqi Zhongji Jieti Xunlian. I dont know if the solution given in the book is wrong or if I simply can't read. The text beside the solution diagram is in Chinese.

If the book solution is indeed wrong, I'll move this over to the errata for Weiqi Zhongji Jieti Xunlian.

[Diagram]

Problem 193

The theme of the problem is: Black will get an eye at the marked point, she must find a method of creating a second eye.

[Diagram]

Book solution 193

[Diagram]

Refutation of book solution

The marked point is not an eye. White will squeeze at 'a'. Black has only one eye.

[Diagram]

Solution?

If White 'a', Black 'b' creates a second eye at W2.
If White 'b' (atari), Black 'c' captures four White stones.
If White 'c' (atari), Black 'b' capture four White stones.


[Diagram]

Refutation

If B1, W2 - W4 kill. After W4 Black is damezumari. (Found by Jantje).

[Diagram]

Suggestion

unkx80: This sure looks like an erratum to me. Also, I suggest this correction. The solution to this correction is a ko, though.

[Diagram]

Suggestion (2)

ferdi: If living is the goal, maybe making the stone at 1-1 a black one works?

unkx80: Ah yes, 4x4 problems expert. =)


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